A Power Buffer in an Electric Driveline: Two Batteries Are Better Than One

Table 5

Battery pack and SESU cost and weight for three different driveline configurations.

Components	kWh	kg	$
Base case battery—Type (a)	15	195	17,800
Low power density battery—Type (b)	15	107	11,600
SESU ultracapacitor	0.25	40	7,500
SESU battery	1.7	23	2,000
Total energy storage
Base case − EV without SESU	15	195	17,800
Battery (b) + supercapacitor SESU	15.25	147	19,100
Battery (b) + battery (a) SESU	16.7	130	13,600
SESU compared with base case
Battery (b) + supercapacitor SESU	+0.25	−48	+1,300
Battery (b) + battery (a) SESU	+1.7	−65	−4,200